peak: add raw-USB driver for PCAN-USB FD family#113
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Implements a raw-USB (rusb) CAN adapter for the PEAK PCAN-USB FD family, speaking the uCAN command/message protocol directly over the USB bulk endpoints without the in-kernel driver or SocketCAN. Supports classic CAN and CAN-FD with full nominal and data-phase bit-timing control via BitrateBuilder, and uses CanAdapter::buffer_size for hardware flow control. Both the command and frame TX paths honor the byte count returned by the USB write so a short write requeues unsent frames instead of dropping them. The in-kernel peak_usb driver is detached automatically on open; the README documents the udev rule needed for non-root USB access. Wires the adapter into get_adapter() and adds the peak bulk stress tests behind the test-peak feature. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Implements a raw-USB (rusb) CAN adapter for the PEAK PCAN-USB FD family, speaking the uCAN command/message protocol directly over the USB bulk endpoints without the in-kernel driver or SocketCAN. Supports classic CAN and CAN-FD with full nominal and data-phase bit-timing control via BitrateBuilder, and uses CanAdapter::buffer_size for hardware flow control.
Adds scripts/peak_usb_unbind.sh to detach the kernel driver so the device can be driven over raw USB, wires the adapter into get_adapter(), and adds the peak bulk stress tests behind the test-peak feature.